1 /*
2  *  OpenBSD setup_initial_stack() implementation.
3  *
4  *  Copyright (c) 2013-14 Stacey D. Son
5  *
6  *  This program is free software; you can redistribute it and/or modify
7  *  it under the terms of the GNU General Public License as published by
8  *  the Free Software Foundation; either version 2 of the License, or
9  *  (at your option) any later version.
10  *
11  *  This program is distributed in the hope that it will be useful,
12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  *  GNU General Public License for more details.
15  *
16  *  You should have received a copy of the GNU General Public License
17  *  along with this program; if not, see <http://www.gnu.org/licenses/>.
18  */
19 
20 #ifndef _TARGET_OS_STACK_H_
21 #define _TARGET_OS_STACK_H_
22 
23 #include "target_arch_sigtramp.h"
24 
25 static inline int setup_initial_stack(struct bsd_binprm *bprm, abi_ulong *p,
26     abi_ulong *stringp)
27 {
28     int i;
29     abi_ulong stack_base;
30 
31     stack_base = (target_stkbas + target_stksiz) -
32                   MAX_ARG_PAGES * TARGET_PAGE_SIZE;
33     if (p) {
34         *p = stack_base;
35     }
36     if (stringp) {
37         *stringp = stack_base;
38     }
39 
40     for (i = 0; i < MAX_ARG_PAGES; i++) {
41         if (bprm->page[i]) {
42             info->rss++;
43             if (!memcpy_to_target(stack_base, bprm->page[i],
44                         TARGET_PAGE_SIZE)) {
45                 errno = EFAULT;
46                 return -1;
47             }
48             g_free(bprm->page[i]);
49         }
50         stack_base += TARGET_PAGE_SIZE;
51     }
52 
53     return 0;
54 }
55 
56 #endif /* !_TARGET_OS_STACK_H_ */
57